| /* |
| * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* Simple S/MIME encrypt example */ |
| #include <openssl/pem.h> |
| #include <openssl/cms.h> |
| #include <openssl/err.h> |
| |
| int main(int argc, char **argv) |
| { |
| BIO *in = NULL, *out = NULL, *tbio = NULL; |
| X509 *rcert = NULL; |
| STACK_OF(X509) *recips = NULL; |
| CMS_ContentInfo *cms = NULL; |
| int ret = 1; |
| |
| /* |
| * On OpenSSL 1.0.0 and later only: |
| * for streaming set CMS_STREAM |
| */ |
| int flags = CMS_STREAM; |
| |
| OpenSSL_add_all_algorithms(); |
| ERR_load_crypto_strings(); |
| |
| /* Read in recipient certificate */ |
| tbio = BIO_new_file("signer.pem", "r"); |
| |
| if (!tbio) |
| goto err; |
| |
| rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
| |
| if (!rcert) |
| goto err; |
| |
| /* Create recipient STACK and add recipient cert to it */ |
| recips = sk_X509_new_null(); |
| |
| if (!recips || !sk_X509_push(recips, rcert)) |
| goto err; |
| |
| /* |
| * OSSL_STACK_OF_X509_free() will free up recipient STACK and its contents |
| * so set rcert to NULL so it isn't freed up twice. |
| */ |
| rcert = NULL; |
| |
| /* Open content being encrypted */ |
| |
| in = BIO_new_file("encr.txt", "r"); |
| |
| if (!in) |
| goto err; |
| |
| /* encrypt content */ |
| cms = CMS_encrypt(recips, in, EVP_des_ede3_cbc(), flags); |
| |
| if (!cms) |
| goto err; |
| |
| out = BIO_new_file("smencr.txt", "w"); |
| if (!out) |
| goto err; |
| |
| /* Write out S/MIME message */ |
| if (!SMIME_write_CMS(out, cms, in, flags)) |
| goto err; |
| |
| ret = 0; |
| |
| err: |
| |
| if (ret) { |
| fprintf(stderr, "Error Encrypting Data\n"); |
| ERR_print_errors_fp(stderr); |
| } |
| |
| CMS_ContentInfo_free(cms); |
| X509_free(rcert); |
| OSSL_STACK_OF_X509_free(recips); |
| BIO_free(in); |
| BIO_free(out); |
| BIO_free(tbio); |
| return ret; |
| } |